On 12/12/17 10:21, Peter Geoghegan wrote:
> ICU supports creating custom collations that reorder upper and lower
> case, or digits with scripts (e.g. Latin alphabet characters). See the
> documentation -- "23.2.2.3.2. ICU collations". Advanced customization
> is possible.
I just gave this a try and I'm not sure I completely understand what
it's doing but it definitely doesn't look like it's sorting according to
EBCDIC byte orders. (This was on centos 7 with libicu-50.1.2) I might
have created the collation incorrectly. I'd love to hear if anyone else
finds a way to get this working outside of custom comparison operators.
pops-10.1 root@db1=# create collation "ebcdic" (provider=icu,
locale='cp037');
CREATE COLLATION
pops-10.1 root@db1=# create table test (data text);
CREATE TABLE
pops-10.1 root@db1=# insert into test
values('a'),('b'),('A'),('B'),('1'),('2'),('!'),('^');
INSERT 0 8
pops-10.1 root@db1=# select * from test order by data collate "ebcdic";
data
------
!
^
1
2
a
A
b
B
(8 rows)
--
http://about.me/jeremy_schneider
